Propeller



Oct. 25, 1932. M.' J. STONE 1,884,984

PROPELLER Filed Jan. 12, 192:9

Patented Oct. 25, 1932 PATENT OFFICE MORRIS J. STONE, F WICHITA, KANSAS PROPELLEB Application led January 12, 1929. Serial No. 332,058.

This invention relates to propellers for4 aeronautical machines and the primary object 1s to provide an all metal propeller wlnch can be constructed in an inexpensive and exa peditious manner, the propeller consisting of certain parts and combination of parts which can be adjusted or caused to assume proper relative positions and then welded into an integral whole. The units or parts of the lo propeller can be made upl and blades adjusted to the proper angle before the welding operation takesplace and should a blade break, the parts are so con tructed that the blade can'be easily removed and-a new one substituted. 16 The method of constructing the propeller as wellas the details of construction of the various parts will be apparent by reference to the following description in connection with the accompanying drawing in which: l

Fig. 1 is a front view of a propeller constructed in accordance with my invention.

Fig. 2 is a disassociated view of a tubular y connector of thetwo propeller blades and a portion of one of the propeller blades. 25 Fig. 3 is a disassociated view of the blade connector, the hub, the sleeve and a portion of one of the propeller blades and lBig. lis a cross-sectional view through one ofthe propeller blades.

The central member or blade connector is shown as comprising a cylindrical tube 1 having alining orifices 2 and 3 at its middle portion through which a transverse tubular hub 4 projects having extended ends 5 and 6. The member 1 connects the two propeller blades 7 and 8. Each blade has a constricted end 9 receivable in the end of the member 1 so that the shoulder 10 abuts against the end of the tube. A sectional cover and a reenforcing sleeve is Areceivableover the tube. It consists of two members 11 and 12 having semi-cylindrical inner faces 1-3 and 14 wit reenforced middle portions 15-and 16 an half` round notches 17 and 18 to ft over the ends ofthe projections of the hub. The hol- 'low pro 11ers may be reenforced by' longitudinal Ihi'aces 19.

. In assembling the pro eller parts, the hub 4 is inserted in the mem er 1;' the ends 9-9 E0 ofthe propeller. vblades are'vinserted in the connector,

en ds ofthe member 1,'then the' members 11 and 12 are slipped over the member 1"'with their ends abutting against the shoulders 10-10. The' propeller blades are then turned on their axis to provide the properA angle. The ends of the member 1, the shouldered portions of the propeller blades and the ends of the members 11 and 12 are now welded together at one operation at each end and the ends of the hub are welded to the members 11 and 12. The longitudinal edges of the members 11 and 12 are also welded together. The propeller is now complete. y

It provides in effect an integal structure requiring no bolts, screws or ot er fastening devices. '.he welded joints, of course, being susceptible of being smoothed o so that unbroken symmetrical lines will appear throughout the entire propeller and with such construction, an entire y all metal propeller is provided.

What I claim and desire to secure by Letters-Patent is 1. An aeronautical propeller comprising two propeller blades, a connector, a pover for the connector, welded joints connecting the connector, the cover and each blade, and a hub passing through the connector andthe cover and welded to the cover.

2. An aeronautical propeller comprising two propeller blades, a connector, a cover for the connector, welded joints connecting the connector, the cover and each blade, and a hub passing through the connector and the cover and welded to the cover, the cover consisting of two complementary longitudinal members embracing the connector.

3. An all metal hollow propeller comprising a connector, hollow propeller blades having ends receivable within the ends of the two longitudinal cover members co-extensive with the len -h of the connector having its ends welde blades, and a hub passing transversely through the cover and the connector.

4. An al1 metal hollow pro eller com rising a connector, hollow prope er blades aving ends receivable within the ends of the connector, 0 two longitudinal cover 'members to the propeller associer co-extensive with the len h of the connr having its ends welde to the prooi' blades, and a, hub passing transversely through the cover and the connector and Welded only to the cover.

5. An all metal propeller comprising a tubular connector, a hub carried thereby, a sectional cover about the connector through which the ends of the hub project and pro- 0 peller blades welded to the connector and the cover.

6. An all metal hollow propeller comprising a tubular connector, a hub passing through the center o'f the connector having 15 a shoulder overlapped by a portion of the connector, hollow propeller blades having constricted ends telescoped into the ends of the connector and a two piece cover embracing the connector having openings surroundo ing the ends of the hub, the cover having its greatest diameter at its middle portion, the cover being welded at its ends to the blades, the hub beingI welded to the cover.

In testimony whereof I affix my signature.

5 MORRIS J. STONE. 

